Electric switch.



No. 778,055. PATENTED DEC. 20, 1904. W. J." LLOYD 81: H. G. WHITE.

ELECTRIC SWITCH.

APPLIOATION FILED APR.6,1903.

2 SHEETS-SHEET 1.

N0 MODEL.

MAGNET/C CLUTCH flMG/VET/C CLUTCH MOTOR AFMATU/FE WITNESSES No, 778,055PATENTBD DEG. 20, 1904. W. J. LLOYD 8: H. G. WHITE.

ELECTRIC SWITCH.

APPLIGATION FILED APR. 6, 1903 2 SEBETSSHBET 2.

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UNITED STATES Patented December 20, 1904.

PATENT OEEIcE.

WILLIAM J. LLOYD AND HAROLD C. IVHITE, OF PITTSFIELD, MASSA- CHUSETTS,ASSIGNORS TO STANLEY ELECTRIC MANUFACTURING COMPANY, OF PITTSFIELD,MASSACHUSETTS, A CORPORATION OF NEW JERSEY.

ELECTRIC SWITCH.

SPECIFICATION forming part of Letters Patent No. 778,055, dated December20, 1904.

i Application filed April 6, 1903. Serial No. 151,270.

To all whom it may concern.-

Be it known that we, WILLIAM J. LLOYD and HAROLD C. WHITE, citizens ofthe United States, and residents of Pittsfield, county of Berkshire, andState of Massachusetts, have invented certain new and usefulImprovements in Electric Switches, of which the following is aspecification.

The object of our invention is to provide means for opening and closingswitches which shall be reliable in action, which shall give a quickmovement to the switch-blades, and which shall permit switches of largesize or of high voltage to be manipulated at a dis.- tance withconvenience and safety to the operator.

Referring to the drawings, Figure 1 shows a side view ofa structureembodying our invention. Fig. 2 shows an end view of the same. Fig. 3shows diagrammatically the arrangement of the control-circuit, and Fig.4 shows a diagrammatic development of the rotary switch in thecontrol-circuit.

A is a small motor, preferably of the directcurrent series type. It isconnected through magnetic clutch B with a shaft carrying the worm C,which gears with wormwheel D on shaft E. Also rigidly mounted on shaft Eare arm F and rotary switch Cr, Fig. 2. Loosely mounted on shaft E iscrank H, which is engaged by arm F, so as to be free to turn only in thedirection of the arrow and which is connected by a connectingrod to rod1, which moves horizontally in guides or bearings J and J. Rod I isprovided at its end with teeth which gear with a gear-wheel (shown indotted lines) inside casing K, which in turn gears with the teeth on theupper end of vertical rod L. Near its lower end rod L is attached to thetoggle-joint formed by levers M M. t

N N are springs compressed by the togglejoint.

I Surrounding the lower part of rod L and forming a guide therefor isthe piece O, which carries at its lower end rod P. Rod P engages agear-wheel (shown in dotted lines) in casing K, which in turn engageswith the 'own friction.

switch-rod Q. The switch, which may be of any well-known type, isinclosed inside the casing R.

Leaving the connections of the control-circuit to be considered laterthe operation is as follows: Assuming that in the position of piece Oand rod P (shown in Fig. 2) the switch is closed, toggle-joint M M willbe in the position shown, springs N N will be compressed, crank H willbe in the position shown in Fig. 1, and rod I will be at the middle ofits travel. Now if clutch B is excited and motor A is started up, so asto revolve wormwheel D in the direction of the arrow, armF will pushcrank H and draw rod I to the right in Fig. 1. This will move rod Ldownward and move toggle-joint M M off its dead-center, upon whichsprings N N will forcibly expand and quickly throw the toggle-joint downwith a hammer-blow on the part of O designated as 0 in Fig. 2. Rod L isfree to move quickly when urged by the springs, since crank H is looselymounted on shaft E. Switch-rod Q is thus thrown sharply inward and theswitch is opened with a quick sharp break. Motor A, however, continuesto run. Arm F catches up with crank H and moves it on until it is in aposition practically diametrically opposite to that shown in Fig. 1. Atthis point rod 1 is again in the middle of its travel, toggle-joint M Mis on its deadcenter, and springs N N are compressed. It is at thispoint that rotary switch G opens the circuit of clutch B and motor A.Wormwheel D is thus immediately stopped, while motor A is allowed tocome to rest under its If now it is desired to close the switch, motor Ais again started up in the same direction. It is evident thattogglejoint M M will be moved upward and will be forced by the springs NN against the part of O designated as 0, which will now be near themid-position of the toggle-joint, and that the switch will be forciblyclosed. Rotary switch G again opens the clutch and motor circuit whenall the parts have returned to the positions shown in Figs. 1 and 2.

Referring now to Fig. 3, the connections of the control-circuit will beobvious. a represents the armature, and a the field of the motor. 6represents the exciting-coil of the magnetic clutch. S represents adouble-pole double-throw control-switch, which may be of any well-knowntype of hand-operated switch or of automatic circuit-breaker suited tothe purpose. 8 s s are contacts (shown also in Fig. 2) adapted to beengaged by rotary switch G. The blades of rotary switch G are so placedwith reference to these contacts as to break the circuit when arm F isin practically a vertical position, as has been heretofore described. sis always engaged by one of the blades of rotary switch G, and s and sare engaged alternately, one making contact before the other breakscontact. This is plainly shown in the diagrammatic development of switchG in Fig. 4. zftare the leads connecting with the source of power forthe control-circuit. Now if s and s are engaged by rotary switch G and Sis thrown to the left, as shown in Fig.3, the control-circu it will beclosed through contact 8', switch Gr, contacts, switch S, clutchcoil Z),motor-armature a, motor-field a, and switch S. The motor willaccordingly start, open, or close the main switch as the case may be,and be stopped by contacts breaking contact when the toggle-joint is onits dead-center, as has been heretofore described. At this point contact8 is engaged by rotary switch G. Consequently if switch S be thrown tothe right by hand or by its'automatic circuit-breaking mechanism if acircuitbreaker of any well-known type is used the motor will again startand reverse the position of the main switch and will again be stoppedwhen the toggle-joint is on its deadcenter by contact 8 breakingcontact. Contacts s and 5- may be pivoted so as to allow a slightmovement in the direction of rotation of switch G and be provided withsprings, as indicated in Fig. 2, to give a quick break on disengagingwith the blades of switch G.

We do not desire to limit ourselves to the particular construction andarrangement of parts here shown, since changes therein which do notdepart from the spirit of our invention and which are within the scopeof the appended claims will be obvious to those skilled in the art.

Having thus fullydescribed our invention, we claim as new and desire tosecure by Letters Patent- 1. In combination, a reciprocatingspringactuated toggle-joint, electroresponsive means for moving thetoggle-joint in either direction from its dead-center, and a switchmechanism adapted to be operated by the movement of said toggle-joint ineither direction from its dead-center.

2. In combination, a reciprocating togglejoint, electroresponsive meansfor moving said toggle-joint in either direction from its dead-center,springs adapted to forcibly compress said toggle-joint, a member adaptedto be impinged upon by said toggle-joint under the influence of saidsprings, and a switch adapted to be actuated by the movement of saidmember.

3. In combination, a switch-actuating mechanism, a spring-actuatedtoggle-joint adapted to forcibly strike said switch-actuating mechanism,and electroresponsive means for moving said toggle-joint in eitherdirection from its dead-center.

4. In combination, a reciprocating togglejoint, a switch mechanismadapted to be operated thereby, springs adapted to compress saidtoggle-joint, and electroresponsive means for moving said toggle-jointin either direction from its dead-center and for restoring saidtoggle-joint to its dead-center against the pressure of said springs.

5. In combination, a spring-compressed toggle-joint, a switch mechanismadapted to be operated by the movement of said togglejoint, anelectroresponsive device for moving said toggle-joint in eitherdirection, and a switch actuated by the movement of said device andadapted to open the circuit of said device when the toggle-joint is onits deadcenter.

6. In combination, a reciprocating togglejoint, a switch mechanismadapted to be operated thereby, springs adapted to compress saidtoggle-joint, an electroresponsive device adapted to move saidtoggle-joint in either direction from its dead-center and to restore itto its dead-center against the pressure of said springs, and a switchactuated by the movement of said device and adapted to open the circuitof said device when said toggle-joint ,is on its dead-center.

7. In combination, aswitch-actuating mechanism, a spring-actuatedtoggle-joint adapted to forcibly strike said mechanism, anelectroresponsive device adapted to move said toggle-joint in eitherdirection from its dead-center and to restore it thereto, and a switchactuated by the movement of said device and adapted to open the circuitof said device when said toggle-joint is on its deadcenter.

8. In combination, a reciprocating togglejoint, a switch mechanismadapted to be operated thereby, springs adapted to forcibly compresssaid toggle-joint, an electroresponsive device adapted to move saidtoggle-joint from its dead-center, and connecting meansbetween saiddevice and said toggle-joint adapted to permit the disengagement fromsaid device of said toggle-joint when moved from its deadcenter.

9. In combination, a reciprocating togglejoint, a switch mechanismadapted to be operated thereby, springs adapted to forcibly compresssaid toggle-joint, an electroresponsive device adapted to move saidtoggle -joint, means adapted to permit the disengagement from saiddevice of said toggle-joint when moved from its dead-center, and theren- Signed atPittsfield, Massachusetts, this 31st gagement of saiddevice with said toggle-joint day of March, 1903.

to restore said toggle-joint to its dead-center, V. J. LLOYD.

and a switch actuated by the movement of HAROLD C. WVHITE.

said device and adapted to open the circuit of Witnesses: said devicewhen said toggle-joint is restored L. A. HAWKINS, to its dead-center. R.E. HAYNES.

